Feeding mechanism for shaker or jigging conveyers



Jan. 9,l 1940. l E. R. BERGMANN 2,186,472

FEEDING MECHANISM FOR SHAKER OR JIGGING CONVEYERS 2 Sheets-Sheet lloriginal Filed Jan. 27, 1958 Her/14S M Jan. 9, 1940. E. R. BERGMANN2,186,472

FEEDING MECHANISM Foa SHAKER muc-Teme coNvEYER's original Filed Jan. 2v.1938 2 sheets-sheet 2 Patented J an.

MECHANISM Foa SHAKER on i JIGGING CONVEYERS I 4FEEDIG.

PATENTlo'FFiCE l'Ernst R. Bergmann, Chicago, Ill.,jassignor to f GoodmanManufacturing Company, Chicago; l IIL, acorporation of IllinoisApplication January' 1938, Serial-No.` 187,145 Renewed April 29, 1939..1 t

This invention relates to improvements in'feed---l ing mechanisms forshaker or jigging conveyers of the type utilized for picking up andtransportingloose material such as "coal, rock, or the like. n. Y

More specifically, .the present invention is an improvement inthegeneral form of feeding devices dis'closedfin my prio-r applicationSerial No.

15'@ adapted to automatically extend lorretract 4an of the frictiongripping devices and for compen.-

reciprocating trough section HI vis supported at its forward endfor'free reciprocable movement Among the objects of my invention istoprovide a feeding device of` a simpler .construction extensible troughsection with respect to a recip--` rocating. trough sectiony ,byIreciprocable movement of the conveyor due to resistance .of theextensible trough section against the ground, which includes a moreeilcient arrangement of adjustl ing mechanism for changing the grippingaction sating for wear of said devices. l v.

Other objects of my invention will appear from time to timeastheaccompanying specic'ation mechanism shown in Figure l showingcertain parts of the conveyer trough brokeny away,fand.

showing. certain parts of vthe feeding mechanism inhorizontal section;

Figure 3 vis a fragmentary view in side elevation of the feeding ydeviceshown in Figure 1 with certain parts broken away'and shown inlongitudinal section in order to more clearly illustrate certain detailsofv my invention; y

Figure 4 is an enlarged transverse sectional view taken through one-ofthe clamping devices;

Figure 5 is a plan view of oneof the clamping devices drawn'tosubstantially the same scale as Figure 4;

l.liigure 6 is substantially along line t--E of Figure 3,;

Figure 7` .isa diagrammaticviewin side eleva-y tionk of the forward endoi 1l,he.panl line showing* the feeding l device.positionedv for.retracting the ring trough section;, and

\ respect to each other.

I t likewisemounted betweenthesideshof said C- a. transverse sectionalview taken extensibley .trough section Lwithinvthe. reciprocati YFigures 8 and 9I are diagrammatic views in side elevationillustratingthe positions'` of the feeding device forextending .orretractingthe extensible trough section. i

In the embodiment of my inventionillustrat'ed in the drawings', the mainelements, thereof'include a reciprocating trough sectionvkIll'connect'ed tothe -forward .end of a shakerv conveyer trough line(not shown). An extensible trough section or vpickup member i lg isadapted to be telescopicallyextended or retracted with respect to saidreciprocating trough section andisfprovdedwth a forwardly projectingared gathering. shovel l2 adapted to reston and slidably move along" theground#rvlrk v .f

The pickup .member His similar to that described in.,my`afcunrementioned prior application, and is supported above thegrou-ndat its. rearward end on a shoe I3 so that the entirey weightv ofsaid troughsection rests. on the ground. The

along said pickup member by means of two pairs of rollers I6, i6yadapted vto ride 'along' bearing plates Il, H' extending laterally fromthe upperv iianges of saidv pickup member and engage the undersurfacethereof `upon theY tender'icy` of said trough sections to bevertically.r displaced with 30y Thev ybearingl plates'l'll. gllV areadapted to be selectively engaged by gripping devices I8, |.8 foreffecting feeding movement of said pickup member. Each of; said grippingdevices includes a set of friction grip blocks 25 and 2.6 mounted inacarrier member 21. Said vcarrier' members are each of aV substantially.C-shaped formation having. the open portion thereof extendingv inwardlykalong thev respective` bearing plate l1. The con.- structionandvoperationof each of said gripping devices is similar so. adescription of one will sufce for both. f The lower friction gripblock.- 2.5 isfmounted in the f3-shaped, carrier memberllfbeneath theopen portion thereofvon a transversely disposed shaft 28 extendingthroughfsaid carrier member` and herein shown as being a bolt having aynut on its end;A The upper frictiongrip block 25 is tical slots`3il,.35i extending above lthe open portion oftfsaid carrier member to permitadjust- .t ment of. said-1 upper friction grip block.

4les

- cated crank 48 on a pivotal pin 4|.

The means for adjusting the upper grip block 25 to compensate for wearthereof includes a pair of pins 3l, 3l mounted at their upperends in across member 32. Said pins extend through suitable apertures formed inthe upper side of the carrier member 2l :and engage the bolt 29 onopposite `sides of saidl friction grip block. The lower portions of theinner sides of said pins are cut away to accommodate the forked ends ofa link 33 pivotally mounted on said bolt on opposite sides of said gripblock (see Figure 4). The purpose of said link will be more clearlyexplained as this specification proceeds. A machine screw 34 is mountedin the cross member 32 at its upper end and is threaded within saidcarrier member so that rotation thereof will adjustably move v saidcross member and pins with respect to said adapted to engage a` squaredhead 38 disposed above said hexagonal head.

The link 33 'extends rearwardly and downwardly from the bolt 29 and ispivotally mounted at its opposite end to the upper end of a bifur- Saidcrank is in turn flxedly mounted on a transverse shaft 43 which ismounted in a forwardly extending forked bracket 44. Said bracket ispivotally connected to the lower forward portion of the bracket memberladjacent one side thereof by means of a pivotal pin 45.

The lower end of the carrier member 2l is connected to the forward endof the forked bracket 44 by means ofa yieldable linkage arrangementwhich includes an eye bolt 46 threaded for a portion of its length andslidably mounted in an apertured boss 4l, projecting forwardly from saidbracket, for yieldable movement with respect thereto in a longitudinaldirection. The eye of said bolt'is pivotally connected to the lower endof the carriermember 21 on a pivotal pin 49 and the head of said eyebolt abuts the insideof said bracket. A compression spring 5i! encirclessaid bolt and apertured boss and is interposed between the forward endof said bracket and aanged sleeve 5I. Said sleeve abuts a nut 53threaded on said shaft to provide for adjustment of said spring.

Thus` when said pickup member is being extended with respect to saidreciprocating trough section as shown by broken lines in Figure 8 andthe forward end of the shovel engages an obstruction, the eye bolt 46will yieldably move inwardly with respect to said bracket which willcause the carrier member to tend to move to a vertical position vandmove the associated grip blocks to a disengaged position with respect tothe bearing plate H.

The friction grip blocks 25 and 25 and carrier member 2l are maintainedin a position for engaging the bearing plate Il by means of a springlink 54 which engages the free end of a crank 55. Said crank is securedto the outer end of the transverse shaft 43 tol move therewith. Saidspring link includes av shaft 56 threaded for a portion of its lengthand secured at its lower end pivotal pin 58 (see Figures 1 and 2).

to a member 51. Said member is pivotally connected to the end of thecrank 55 by means of a The opposite end of said shaft is slidablymounted in a member 59 which is pvotally mounted in a projecting end 65of the bracket 44.- .A spring 6l encircles said shaft and is interposedbetween a nut 62 threaded on said shaft (for adjusting the compressiveforce of said spring) and the member 59. Said crank thus reacts againstsaid spring link and saidlink tends to hold the carrier member in aposition so that the grip blocks 25 and 26 will engage the bearing plateIl upon the proper stroke ofthe conveyer.

Positioning of the carrier member Zl'for feeding the extensible troughsection in either a forward orreturn direction with respect to thereciprocating trough section is eected by means of a hand crank 63mounted on the end of a transverse .shaft 64 which extends transverselybeneath' the extensible trough section Il and is mounted in the brackets44, 44 adjacent its .ends in al manner which will hereinafter moreclearly appear. A crank 65 is mounted on and secured tothe shaft `64between the furcations of `the bracket 44. Said crank in turn isconnected to the crank 45 by means of a' link 66, which is pivotallyconnected to said first mentioned crank by means of a pin 61 and whichis pivotally connected to said second mentioned crank vby means of thepin 4|- When the hand cranks 63 are in the position shown by brokenlines in Figure 8 and the carrier member 2l is inclined in a rearwarddirection, the blocks 25 and 26 will be engaged with the bearing platesll', ll upon the forward stroke of the conveyer. This gripping action isattained by movement of the carrier member 21 about the axis of thebolt29, effected through forward movement of the bracket 44 and eye bolt 46through the spring 5U in a direction to clamp said grip blocks on saidbearing plates. Upon the return stroke of the conveyer frictionalresistance of the trough section Il against the ground will hold saidtrough section from movement with respect to the ground to an extentsufficient to cause the carrier members 2l, 2l to pivot in acounterclockwise direction about the axes of the bolts 29, 29, aided byreturn movement of the eye bolts 46, 46, anddisengage said grip blocksfrom the bearing plates Il, Il. At the same time the spring links 54, 54will be exerting pressure against the cranks 55, 55 to move said gripblocks to an engaged position with respect to said bearing plates assoon as a return stroke of the conveyer has been completed When eitherone of the hand cranks 63 is moved to the position shown in Figure 7,the parts are positioned for retracting the extensible trough sectionwithin the conveyer trough section. When in this position the carriermembers 2l, 2l will be pivoted about the -axesof the bolts 29, 23 by thebrackets 44, 44, compression springs 5D, 50, and eye bolts 46, 46, whichwill engage the grip blocksl 25 and 26 with said extensible troughsection upon the return stroke of the conveyer, and tend to move saidgrip blocks to a released position with respect'to said extensibletrough section upon the forward stroke of the conveyer.

The grip blocks 25 and 26 are locked in an engaged position with respectto the bearing plates Il, Il or locking the extensible trough with thereciprocating trough section when the hand crank 63 .is pivoted in aclockwise direction against the 'spring sur anni the crank sa ips-1m aposition past.

l ,1 andere' said extensible trougnfsection with respect to dead center,as is shown-inFigure 9. v"The nevel means for adjusting the gripping'force of the grip blocks 2,5Y andiii, and for compensating for Wear ofsaid blocks and the pins and links in the feeding mechanism is asfollows:

The shaft iiiiis mountedadjacent itsends in eccentri'csl'eeves 68 Se.vEach sieeve is mounted in the outer side of the forked bracket-441011pivotal movement with respect 'thereto so that turning movement thereof'will change the position of the shaft 6d and cranks l65 and liti withrespect to said bracket for increasing' or decreasingt'lrievinclination` of the carrier member 251 with` respect to the`bearing plates i'i, I'l, when positioned for either extending orreti-acting the eX- A plurality of vnuts. having bolts thereonandindicated by reference character i2 are adapted to register forengagement'with said vapertures andl said sleeveand hold said sleeve invfixed relation with respect to said bracket.

' yWhen it is desired to change the force with which the grip blocks 25and' 26 yengage the 'bearing platesL ii, il, to give 'said grip blocks agreater gripping pressure to 'compensate for .an

vascending grade, or a lesser ygripping pressure whenthe feeding deviceis arranged down grade or along the level, or to'take care of wear 'ofsaid grip blocks andthe links and pins of the feeding device, the boltsl2 are removedfrom the flange 69 and the eccentric sleeve 68 is turnedin the desired direction to inciine the Acarrier.member 2'! at a greaterangle with-respectl to the' vertical to obtain a greater grippingforce,4or at a lesser angle to` decrease the grippingaction of said grip.

` blocks. Figure lk shows this sleeve inoneextiem'e position ofadjustment and Figure 3l shows it in another extreme` position ciadjustment. An indicating lug ibi projects outwardly from the a-nge ofeach `oi said eccentric sleeves to form a means for indicating theposition of I adjustment of said sleeve so` that each sleeve on eachlside of the conveyor maybe" inthe lsaine position of adjustment toenablev a uniform' gripping pressure to be attained by'ea-ch set of gripblocks.

It will be seen from the foregoing that a new and improved form ofautomatic lfeeding mechanisni for a vshaker conveyerhas been providedwhich is of la simplifiedv construction and which includes a novelarrangement of links and levers for effecting engagement ordisengagement of iorm in which 'my invention may be embodied',

' itedin the appended claims.

the gripping devices of the extensible trough section and whichaiso.includes a novel and efficient form of adjusting means to enable thegripping force ofvsaid gripping devices to be uniformly adjusted in a.simplified manner.i a

While I haveherein shown and de cribed one it willbe understood that theconstruction thereof 'and the :.,ngernent ofthe various parts may bealtered without departing iromthe spirit and scopethereof. Furthermorado not.` wish to bev construed as limiting myself to thespecific emibodirnent illustrated,'excepting as'it may be Iini- I claiml as myinvention; l i. In a 'feeding device for shaker cc-nveyers',

a reciprocating trough section, an extensible trough section, means forextending or retractsaidreciprocatingtrough section including acarrie'rmemrberia pairY of friction -grip blocks mount- 'edi-therei'n,`a bracket pivota-lly connected to the i forward end" of saidkreciprocating trough section,`

a link mounted' in saidbra'cket for yieldable movement withrespect'theretoin alongitudinal directionA andV a" pivotal connectionbetween said' link andiy one endv of saidv carrier member, a

, `crank pivotally mounted in said' bracket and a connection betweensaidcrank and the other end* of said carrier member, means forpositioning saidcarrier member toextend or retract said extensible'trough sectienincluding ano-ther crankr pi'votall'y' mountedinsaid'bracketfand a connection between saidl crank 'andi said 'firstmentioned' `crank, and other lmeans for adjusting said carrier 'membertochange the 'gripping force of said grip,

blocks yincludingv an eccentric member frnounted f i in said bracket and`forming a` support for said mi' secondi mentioned' crank'.

l -21 In'afeedingA device for shaker ccnveyers', a reciprocating troughsection, arr-extensible trough section,` meansior extending orretracting said extensible'troughf-sectionfwith respect to saidreciprocatingtrough section including a carrierl k member, a pair offriction;l grip blocks mounted therein, va brackebiivotaiiy ,connectedtc the f or- *W'ard end yof 'said reciprocating trough section', a

link mounted in said bracket for yieldable movement withrespect theretoin a longitudinal direction and a pivotalv connection between said linkand one end oi saidfcarrier member, a crank in nivotally` mounted inysaid"bracketl and a connec-A tion between said crank'andtheother end ofsaid carrier member, Ameans for positioning said carrier member toextend or retract said extensible trough section including anotherycrank pivotally mounted in said bracket and a connection betweensaidcrank andsaid ilrstmentioned crank,

and other means for adiusting said carrier mein-fr ber toV change thegripping force lof said grip" blocks including an eccentric membermounted insaid bracket and' forming a supportffor said second mentionedcrank, rand means permitting saidmember to be rotatably ,moved to varythe angulary position of said crank with respect to said bracket, saidmeans'also forming a means.,

for lholding said member from rotation.

3,1111 a feeding device `for shaker conveyer var reciprocating troughsection, an extensible.

trough section, means for extending or retracting said "extensibletrough. 'section with' respect toy saidreciprocating trough sectionincluding a carl riermernbcr, a pair of friction grip blocks mountedtherein, abracket pivotally connectedl to the forward end ofsaidreciprocating trough section, a link mounted in said bracket foryieidable movement with respect theretoA in va longitudinal directionandA a. pivotal connection between said link-and the lower end of saidvcarrier member, a

crank pivotally mounted in bracket and a connection between saidlcrankland the upper end ofsaid carrier member, means for adjusting the Kposition of said'carrier member vforfextendil'ig ory retracting theextensible trough section including another crank pivotally mounted insaid k bracket and a connection between said crank and said firstmentioned crank. and other means for adjusting said carrienrnember andthe gripping force off-said grip blocks including eccentricAsleeveforming a support for said iast mentioned crank. .y j

erin la feeding device for shaker conveyors,

a reciprocating trough section, an extensible trough section, means forextending yor retracting said extensible trough vsection with respect tosaid reciprocating trough section including a carposition of saidcarrierimember for extendingor retracting the extensible trough sectionincluding another crank pivotally mounted in said bracket and aconnection between said crank and said rst mentioned crank, and othermeans for adjusting said carriermember and the gripping force of saidgrip blocks including aneccentric sleeve forming `a support for saidlast mentioned crank and means permitting said sleeve to be rotatablymoved to vary the angular Vpostion'of said crank with respect to saidbracket, said meansalso forming a means for holding said support fromrotation.

5. In a feeding device for shaker conveyers, a reciprocatiog troughsection, an extensible trough section, means for extending or retractingsaid extensible trough section with respect to said reciprocating troughsection including a carrier member on each side of saidextensiblertrough section having friction grip blocks mounted therein, abracket pivotally connected to the forward end of each side of saidreciprocating trough section and projecting forwardly therefrom, la linkmounted in each of said` brackets for yieldable movement with respectthereto in al longitudinal direction, and pivotal connections betweensaid links and the lower ends of said carrier -mernbers acranklpivotally mounted in each of brackets and connections between eachof said cranks and the upper ends of said carrier members, means forpositioning said carrier members to extend or retract the extensibletrough section including a shaft mounted adjacent its ends in saidbrackets and extending beheath said extensible trough section, a pair ofcranks mounted on said shaft, each of said cranks being adjacent one ofsaid brackets, and links connecting said rst mentioned cranks with saidlast mentioned cranks, and other means for adjusting the gripping forceof said grip blocks invmovement with respect thereto in a longitudinaldirection and pivotal connections between said links and one of the endsof said carrier members, a crank pivotally mounted in each of saidbrackets and connections between said cranks and the opposite ends ofsaid carrier members, means for adjustably moving said carrier memberstoextend or retract the extensible trough section including ashaft'mounted adjacent its ends in said brackets and extending beneathsaid extensib-le trough. section, a pair of cranks mounted on saidshaft, each of said cranks being adjacent one of said brackets,connections between said first mentioned cranks and said last mentionedcranks, and other means for adjusting the gripping force of said gripblocks including an eccentric sleeve mounted in each of said bracketsand forming bearings for said shaft, and means permitting said sleevesto be rotatably moved to vary the angular position of said cranks withrespect to said brackets, said means also forming a means for holdingsaid sleeves from rotation. v

7. In a feeding device for shaker conveyers, an extensible troughsection supported so that its entire weight rests on the groundindependently of the rest of the conveyer, a reciprocating troughsection mounted for free movement along said extensible trough section,means actuated by reciprocable movement of the conveyer due toresistance of said extensible trough section on the ground forautomatically extending or retracting said extensible jtroughsectionwith respect to said reciprocating trough section includingiriction gripping means and a carrier member forming a support therefor,a forwardly extending bracket pivotaily connected to the forward end ofsaid reciprocating trough section and a link mounted in said` bracketfor yieldable movement with respect thereto in a longitudinal direction,a pivotal connection between said link and one end of said carriermember, a link connected to the other end of said carrier member, acrank pivotally mounted in` said bracket and having pivotal connectionwith said second mentioned link, another crank mounted coaxial with saidrst mentioned crank for movement therewith and a spring link engagingthe end of said crank and forming a Imeans against which said cranksreact, a third crank spaced from said rst two cranks and havingconnection 4with said first mentioned crank for positioning said carriermember to extend or retract the conveyer, and means for adjusting theposition of said third crank with respect to said bracket and adjustingthe gripping action of said gripping means including an eccentric sleevewithin which said last mentioned crank is mounted.

8. A feeding device in accordance with claim 'I wherein meansregistering for engagement with the sleeve and bracket are provided forholding said sleeve in fixed relation with respect to said bracket orpermitting said sleeve to be adjustably moved with respect to saidbracket.

9. In a feeding device for shaker conveyers, an Y extensible troughsection supported so that its entire weight rests on the groundindependently of the rest of the conveyer, a reciprocating troughsection mounted at its forward end for free movement along saidextensible trough section, means actuated by reciprocable movement ofthe conveyer due to resistance of said extensible trough section on theground for automatically extending or retracting said extensible troughsection with respect to said reciprocating trough section includingfriction gripping devices and a carrier member mounted on each side ofsaid extensible trough section in advance of said reciprocating troughsection and forming supporting means for said frictiongripping devices,means for connecting said carrier members with said reciprocating troughsection including a forwardly extending bracket pivotally connected toeach side ,g1-sense fithe 'forward end. of said reci-proeatin'g rtroughsection, connecting members mounted-Sv in ,,said

brackets for yieldable movement withrespect thereto in a longitudinaldirection, pivotal .connections between said membersand the lower vendsof said carrier members, ai crankjpivotally mounted in eachv of saidbrackets' and links'connecting the upper ends of said carrier memberswith said cranks, another crank mounted coaxial with each of saidfirst-mentioned .cranks and spring links engagingftheends of Vsaidcranks,

means for positiningsaid carrier 'members tov/extend or retract the'conveyor including-a transi verse shaft mounted f adjacent'its gendsinsaid brackets,a third crank on said. 'shaft adjacent each endfthereof, aconnection between each of said first and thirdv` mentioned cranks, andmeans for adjusting the position of'said third mentionedcranks withrespect lto said brackets andadjust- Ving the gripping--action-gof saidgripping means including an eccentric sleeve mounted in each of vsaidbrackets and forming bearings for said shaft. l

. l0. A feeding device in accordance with. claim 9 wherein meansregistering for engagement with the sleeves and brackets are providedfor holding said sleeves from rotation or permitting adjustable movementthereof with respect to said brackets.

l1. A feeder head for shaker conveyers including an extensible troughsection, a carrier Vmember mounted for rocking movement' with respect tosaid extensible trough section, 'a pair of friction grip blocksinountedin said carrier member and adapted to grip said extensible troughsection above and below a portion there# of upon certain strokes of theconveyer, means for positioning said carrier member tov cause said gripblocks to extend or retract said extensible trough section at willincluding a crank yarm, a

connection from said crank arm'to said carrier member, and means for`adjusting the position of said carrier member with respect to saidextensible trough section to change the gripping force of said gripblocks including 'an eccentric member mounted for adjustable movementabout atrans verse axis and formingva pivotal support for` said crankarm,

12. A feeder head for shaker conveyers including an extensible trough`section'ajfcarrier member mounted for rocking 'movement with re'- spectto said extensible trough section, a pair of friction grip blocksmounted in said vcarrier member and adapted to grip saidextensibleftrough section above and below a portion thereof uponl:certain strokes of the conveyer, means for posifly tioning'said carriermemberv to 4cause said 'grip blocks to extend or retract said extensibletrough section at will including a crank arm, a connection from said'crank arm to said carrier member, means for adjusting the position` ofsaid carrier member with respect to said extensible trough section tochange the gripping force of saidgrip blocks including an eccentricmember mounted for adjustable movement about a transverse axis andforming a pivotal support for said-crank arm," and means for permitting;adjustable turningmovement of said eccentric member, to Vary the angularposition of said crankarm, vsaid means also forming a means for 'holdingsaid eccentric member from rotation.

13. kIn a feeding. device for shaker` conveyors, f a reciprocatingltrough section,an extensible trough section adapted to be nestedtherein, a

lcarrier member havinga. pair of friction grip said crankarm; 144 Infeeding .devi@ blocks mountedtherein forextending orf-retract# 'yingsaid-.extensible trough section withrespect ,tioningf saidcarriers-member to cause saidfgrip blocks tofextend or retract saidextensibletrough, -sectionlincluding a crank arm, a connection; fromsaid crank arrnto said carrier member,l fand.

to A said reciprocating trough section, abracket .piw'itallyconnected tosaid reciprocatingv trough 1 section, operative connections :fromsaidbracket) to said-carrier :member yforuengaging said grip l blocks `withsaid extensible ytroughsection }1 1p oncerta-in strokesof theconveyer,means for posi.

means for adjusting the y'angle of said-carrier `5 member with respectIto' said extensible trough 1 section to change the gripping force ofsaid grip., blocks including aneccentricsleeve mounted-inf) saidbracket'and forming @a pivotal supportfor y b forv shaker conveyors,

carrier member'ha'ving a -pair' of friction gripfblocks mount'edthereinfor extending or retracting said vextensible troughsection withrespect..

-to 'said reciprocating troughsection, a bracket having pivotalconnection'with said reciprocating trough s`ection,1operativeconnections from .said` vbracket to said carrier member forengaging'said i grip blocks with said extensible trough section uponcertain strokes of the conveyor, means kfor positioning said carrierymember to cause said grip'blocks toextend or retract said extensibletroughsection including a crank arm, a connection from said crank arm tosaid carrier inem-I ber,pmeans'for adjusting the angle of said carriermember with respect to said extensible trough section -to change the-grippingforcecf f said grip blocks including an leccentric sleevemounted in said bracketl and forming av pivotal `Y support for saidcrankarm, and means pern'iitting said sleeve to be rotatably'moved to .varythe angular position of said crank arm. with respect tosaid bracket,said mea-ns also forming a means for holding said sleeve from rotation.

15.v Acarrier vmember for feeding vi'ievices-yforl shaker conveyersincluding a frame having an open central portion, apair of friction gripblocks, a pivotal pin for mounting each ofsaid I grip blocks v in` saidframe above and belowthe said lower grip block and holding it inadjustandhaving engagement with said pin whichsupy yports said'u'pperIg-rip block, on opposite sides of, f

Geol i together,"and.a threaded member having engage- Y said grip block,a member vvconnecting said pins ment with said member and frame formoving said'member and upperl grip block towards said-y L l'lower gripblock upon turning movement of saidvk threaded member. y f l' 16. Acarrier memberlfor feeding devices for lshaker `.conveyors` ir1cludingjavframe having an f above and belowthe open j iortionthereof, said gripblocks being adapted to engagea shaker conveyer trough section above andbelow a portionthereof upon vcertain strokes ofthe conveyeizh and meansfor adjustably moving said upper grip .open central `portion, a pair offriction grip 'I 'I blocks .mounted in said frame, a pivotal pin for ymountingeach of said grip blocks in said frame 70y y areciprocating'trough section, an 4v'extensible trough sectionadaptedtoibe nested therein, af

lblock including apair of parallel spaced pinsY slidably mounted in saidframe and having engagement with said pin whichsupports said upper gripblock, on opposite sides of said' grip block, a member connecting saidpins together, a threaded member having engagement with said member andframe for moving said pins towards said lower grip block upon turningmovement of saidthreaded member, and means for selectively holding saidthreaded member `from turning movement. l o l 17. A carrier member forfeeding devices for shaker conveyers including a frame having an opencentral portion, a pair of friction grip blocks mounted in said frame, apivotal pin for mounting each of said grip blocks in said frame aboveand below the open portion thereof, said 392'() grip blocks beingadapted to engage a shaker conveyer trough section above and below aportion thereof upon certain strokes of the conveyer, and means foradjustably movingsaid upper grip block towards said lower grip block andholding it in adjustment with respect to said lower grip block includinga pair of parallel spaced pins slidably mounted in said frame and havingengagement with said pin which supports said upper grip block, a memberconnecting said pins together, and a threaded memberhaving engagementwith said member and frame `for moving said pins towards said lower gripblock upon turning movement of said threaded member, said threadedmember having an irregularly formed portion, 15

selectively holding said threaded member from rotation.A

i ERNST BERGMANN. 20

